Security advisory

{
  "id": "663cb3b19da7566452d53568060cbe1c621ad257bcccfcd26f9e043bc733f64a",
  "url": "https://osv.dev/vulnerability/CVE-2020-15522",
  "method": "structured",
  "payload": {
    "kind": "advisory",
    "title": "CVE-2020-15522",
    "summary": "Bouncy Castle BC Java before 1.66, BC C# .NET before 1.8.7, BC-FJA before 1.0.1.2, 1.0.2.1, and BC-FNA before 1.0.1.1 have a timing issue within the EC math library that can expose information about the private key when an attacker is able to observe timing information for the generation of multiple deterministic ECDSA signatures.",
    "evidence": "osv:CVE-2020-15522",
    "products": [],
    "severity": "medium",
    "structured": {
      "id": "CVE-2020-15522",
      "aliases": [
        "CVE-2020-15522",
        "GHSA-6xx3-rg99-gc3p"
      ],
      "metrics": [
        {
          "type": "CVSS_V3",
          "score": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N"
        }
      ],
      "affected": [
        {
          "ranges": [
            {
              "repo": "https://github.com/bcgit/bc-csharp",
              "type": "GIT",
              "events": [
                {
                  "introduced": "0"
                },
                {
                  "fixed": "1cbd476c1eaf32a928a926ebb0ec346821753661"
                }
              ],
              "database_specific": {
                "extracted_events": [
                  {
                    "cpe": "cpe:2.3:a:bouncycastle:bc-csharp:*:*:*:*:*:*:*:*",
                    "range": [
                      {
                        "introduced": "0"
                      },
                      {
                        "fixed": "1.8.7"
                      }
                    ],
                    "source": "CPE_RANGE"
                  }
                ]
              }
            }
          ],
          "versions": [
            "release-1.8.6",
            "release-1.8.5",
            "release-1.8.4",
            "release-1.8.3",
            "release-1.8.2",
            "release-1.8.1",
            "release-1.8.0",
            "release-1.8.0-RC.3",
            "release-1.8.0-RC.2",
            "release-1.8.0-RC.1",
            "release-1.8.0-beta.4",
            "release-1.8.0-beta.3",
            "release-1.8.0-beta.2",
            "release-1.8.0-beta.1"
          ],
          "database_specific": {
            "source": "https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2020-15522.json"
          }
        }
      ],
      "modified": "2026-10-24T10:30:17.456538271Z",
      "provider": "osv",
      "references": [
        "https://github.com/bcgit/bc-csharp/wiki/CVE-2020-15522",
        "https://github.com/bcgit/bc-java/wiki/CVE-2020-15522",
        "https://security.netapp.com/advisory/ntap-20210622-0007/",
        "https://www.bouncycastle.org/releasenotes.html"
      ],
      "provider_metadata": {
        "unresolved_ranges": [
          {
            "cpes": [
              "cpe:2.3:a:bouncycastle:bouncy_castle_fips_.net_api:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "bouncycastle:bouncy_castle_fips_.net_api",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.0.1.1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:bouncycastle:fips_java_api:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "bouncycastle:fips_java_api",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.0.1.2"
                  },
                  {
                    "introduced": "1.0.2"
                  },
                  {
                    "fixed": "1.0.2.1"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          },
          {
            "cpes": [
              "cpe:2.3:a:bouncycastle:the_bouncy_castle_crypto_package_for_java:*:*:*:*:*:*:*:*"
            ],
            "vendor_product": "bouncycastle:the_bouncy_castle_crypto_package_for_java",
            "extracted_events": [
              {
                "range": [
                  {
                    "fixed": "1.66"
                  }
                ],
                "source": "CPE_RANGE"
              }
            ]
          }
        ]
      }
    },
    "related_cves": [
      {
        "value": "CVE-2020-15522",
        "evidence": "/id"
      }
    ],
    "security_relevant": true,
    "severity_evidence": "/severity/0/score"
  },
  "source_id": "core-osv",
  "document_id": 429568,
  "published_at": "2021-05-20T12:15:08.003+00:00"
}